The silicon wafer is the carrier of the solar cell. The quality of the silicon wafer directly determines the conversion efficiency of the solar cell. The advantages and disadvantages of solar cells need to pass the test sorting. How can the production process be controlled for bad solar cells? The following is the control flow of a bad solar cell:
1. Count the quantity on the bill of materials when picking, and whether the grade (efficiency or power) matches the actual object;
2. Before unpacking, the sorting personnel shall check whether the outer box is damaged or deformed due to impact. If there is any deformation or damage, notify the quality control personnel to confirm on the spot;
3. After unpacking, the sorting personnel confirm the quantity and grade (efficiency or grade) on each package label, and whether it is the same as the issue order;
4. Before unpacking, the sorting personnel shall check the appearance package and battery sheet of each package. If there is any problem, notify the quality control personnel to confirm on the spot. If there is no problem, continue to unpack and sort;
5. After unpacking, check the number of battery packs per pack. If there is a small number of phenomena, notify the quality control to confirm the signature (issue an exception sheet), and then go to the warehouse to replenish;
6. Sort the appearance of the battery piece according to the company's inspection standards during sorting, and classify the bad pieces (fragments, chipping, missing corners, color points, poor printing, etc.), and control the defective pieces before the end of production. Re-confirmation, such as continued production into the company within the company's standards, such as the production of raw materials and raw material fragments returned to the warehouse;
7. Single-welding inspection, single-welding pre-selection of the selected films before welding. If defects are found during the mutual inspection, they must be confirmed by quality control, and continue to be put into production within the company's standards. The outside party and the quality control staff also sign the name and cell conversion rate on the back of the battery sheet to sort and replace. Such films are recorded as poor production sorting;
8. In the single welding process, a bad film appears, and the quality control judgment is also required. The battery piece has not been welded at the same time, and the quality of the battery piece itself (color point, poor printing, perforation, etc.) the quality control person signs the name behind the battery piece. The raw materials are not badly sorted and replaced; the battery pieces have not been welded, and the parties and the quality control personnel who have chipped, chipped, and cornered have signed the name and cell conversion rate on the back of the battery sheet to sort and replace. Poor operation; all the parties and the quality control personnel who have the bad film in the welded battery have signed the name and the conversion rate of the battery on the back of the battery to the sorting and replacement. Such films are recorded as poor production.
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